Mounting rotors on arbors of various transaxial contours



Nov. 10, 1959 D. E. GOMMEL 2,912,021

MOUNTING ROTORS ON ARBORS OF VARIOUS TRANSAXIAL CONTOURS Filed March 10, 1958 United States Patent Ofiice 7 2,912,021 Patented Nov. 10,

MOUNTING ROTORS N ARBORS 0F vARIoUs I TRANSAXIAL CONTOURS This invention relates to a means for mounting rotary tools on arbors of various transaxial contours.

It is well-known that there are many difierent power driven machines manufactured today having arbors or output shafts on which various separate rotary tools are intended to be selectively mounted. One such rotary tool is a circular saw blade which is provided with a central eye means therein whereby the rotary tool is adapted to be telescopically mounted'on an arbor of a power driven machine. Each machine, of course, is adapted to drive many different types of rotary tools. The arbors of the various power driven machines that are on the market today have varied in cross sectional size and have been formed with either circular, square or rhombic cross sectional configurations. Because the rotary tool machines have been made with the aforementioned difierence in the arbors thereof, rotary tool manufacturers have been attempting to provide rotary tools with universal eye means that would permit the rotary tool to be appropriately mounted on arbors of different cross sectional configurations and sizes. It is known that there are two power driven machines on the market today, one of which has a standard size rhombic cross sectional arbor and the other having a standard size square cross sectional arbor where the perpendicular distance between the opposed parallel sides of the rhombic arbor is substantially squal to the length of the side of the square arbor. theer is a rotary tool machine that has a circular cross sectional arbor, the diameter of which is substantially equal to the length of the side of the previously mentioned standard size square shaped arbor. A universal It has also been found that eye means has been designed for rotary tools whereby the rotary tool is adapted to be selectively mounted on the standard size square, round and rhombic cross sectional arbors mentioned above. Such a universal eye means is' fully disclosed in the United States patent to G'ommel, No. 2,649,868. I

I-t'has been found, however, that there are many power tool machines produced today having arbors of circular and square cross sectional configuration which vary in size from the previously mentioned standard size circular and square shaped arbors. It has further been found that a rotary tool having an eye means formed therein in accordance with the teaching of the afore-mentioned patent is not adapted to be accurately or positively mounted on the selected circular-shaped arbor 'as there is transaxial movementbetween the rotary tool and the round arbor.

It is, therefore, a primary object of this invention to provide a universal eye means in, a rotary tool whereby the rotary tool is adapted to be selectively mounted on arbors having a particularly sized circular, square or rhombic cross sectional configuration in such a manner that the rotary tool is prevented from transaxial movement relative to the particular arbor on whichthe rotary tool is mounted. It is. another object of this invention to provide an eye means in a rotary tool whereby the edge of the rdtary tool defining the eye means therein is adapted to have portions thereof positively engage correspondingly shaped portions of the outer peripheral surface of either a particularly sized round, square or rhombic cross sectional arbor in such a manner that the rotary tool is prevented from transaxial movement relative to the particular arbor on which the rotary tool is mounted.

It is a further object of this invention to providean eye rneans in a rotary tool as set forth inthe preceding objects which is also adapted to receive a bushin'g therein having a central eye means formed therein so that the rotary tool may be mounted on an arbor having a cross sectional configuration smaller than at least one ofjthe standard sized round, square or rhombic cross sectionally shaped'arbors that are cooperable with the eye ,means formed in the rotary tool. 3

Other and more particular objects, uses and advantages of this invention will becomeapparent from a reading of the following detailed specification taken in connectionwith the accompanying drawing forming a part thereof and wherein: a

Figure l is a side view of a conventional rotary tool such as a circular saw blade having a circular eye means formed therein;

Figure 2 is a fragmentary side View ofa rotary too having a square eye means formed therein. l

Figure 3 is a similar fragmentary view showing a mom bic shaped eye means formed in a rotary tool.

Figure 4 is a similar view illustrating a combination eye means whereby the rotary tool is adapted to be mounted on either a standard size square or rhombic shaped arbor. I I v Figure 5 is another similar view showing a prior known combination eye means formed in a rotary tool whereby the rotary tool isladapted to be selectively mountedon standard size round, square and rhombic cross sectional arbors. q t

Figure 6 is a side view of a rotary tool having an eye means formed therein in accordance with this invention whereby the rotary ,tool is adapted to be selectively mounted on arbors of circular, square and rhombic cross sections. s f

Figure 7 illustrates a rotary tool having an eye means formed therein in accordance with this invention and having a bushing means received in the eye means thereof in order that the rotary tool maybe mounted on a smaller sized circular cross sectional arbor by means of a central eye means'formed in the bushing. v

Figure 8 illustrates a bushing similar to the bushing illustrated in Figure 7 except that the eye means formed there in adapted to receive an arbor having a square cross sectional configuration.

Reference is now made to the drawing wherein like reference numerals are used throughout to designate like parts and wherein Figure 1 illustrates a conventional form of a circular saw blade 10 provided with a concentric circular eye means 11. This blade 10, of course is only adapted to be mounted on an arbor having a circular cross section. For purposes of illustration only, the fragmentary views of the rotary tools 10 illustrated in Figtime 1-7 have been referred to .as circular saw blades. However, it'should be understood that any type of rotary tool may be used, the feature being deemed essential to this invention is the particular eye means formed therein. The rotary tool 10 illustrated in Figure 2 is provided with a standard size square eye means 12 defined ,by four trated, the square eye means 12 is adapted to circumscribe a circle 11' disposed concentric therewith and shown in dotted fo'i-in. Th pei'pe'lidicular"distance between each pair of opposed sides, 13-15 or 1416, is equal to the diameter; of the circumscribed circle 11'. it should be noted that each of thesi 11-16 of the square eye means 12'are disposed tahgential to the circle The retarjy tool iIIustfa'ted'ih Figure 2 is adapted to be mountf her; a square cross sectional arbor corresponde to the square eye means 12 'or one round 'cQroiss sectional 'a'rbor having a diameter, "corresponding in size to; the diameter of the circle'l'l When the rotary tool 10 is mounted on the roiliicl arbor each of the sides 13 1 6 of the eye means '12 'erigagethe outer peripheral surface of the round arbor? at the perpendicular bif h i .t. t l ,H

"'Eigure' '3 illustrates, a fragmentary side view of, a rotary'tool' loremea with a' "rh bic eye, wh r by t e. misty; feat 10: is adapted to be; nema on 'daid a'rbiirs. nay'm'g either: oi; dlamond ea crbs's' sectidnnra' roiih hap nfctds Se: It. The rhombic eye means 21 is definedljyj a first pat r of parallel 22, and 23 and"asecond. pai r parallel s ide's"2j4 and 25. The, s ide22" jbins' the adiaeentsi 'des 21 and 24 atp'oints 2 6 and 27 respectively and the side 23 joins the' adjacent sides 24 'and'25 at' points 28. 29 re.- speetively. The rhombic eye means 21. issofformed; that it adapted to 'circurriscribe. a concentrically disposed circle 11; which circle corresponds in sizetd. the, circi1m scribed ci cle 11' illustrated in, Figure. 2, -Ir'fthis: each of the sides 2 -25 aredisposed'tangefitial fo the circumscribed"circle 11'. Wheri'a round arbor, having a'diameter equal to the diameter of the circle: 1T1,i s re.- ceivedin the eye means 21, each, of the sides 2225 engage the outer peripheral surface of the round arbor thereby preventing transaxi'al movement of the rotary tool 10 relative 'to the round arbor.

It can be seen that the, rotary tool 10, illustrated in Figure 2 is adapted to be selectively mounted onfcer tain sized" square shaped arbors and on certain, sized round shaped arbors. Similarly, the rotary tool 10,illustrated in Figure 3 is adapted'to be selectively mountedon certain sized rhombic shaped arbors and on the same round shaped arbors thatare. also" cooperable with the Figure h9dim 1 The rotary tool 10 illustrated in Figure 4. discloses a rotarytool having another pridr'knownedmbinafieii eye means 30 formed therein. The. rotary tool 10, shownin l igureh, isadaptedtdbe selectively mounted n', either a standardsize rhombic. arborffor a" standardfsize square arbor which arbors are respectively adapted to mount the rotary toolsillustrated in Figures 3 and'2. The eye means 30 is formed by superimposing the square eye means 12, illustrated in Figure), upon the. rhombic eye means'21 illustrated in Figure,3. The square eye means 12 is soplaeed upon the rhombic eye means 21 'that the diagonals of the rhombic eye 21 perpendicularly bisect the sides of the square eye 12. "Inthis. manner. the perimeter of the eye means 30 is definedtin part by an edgeport ion 22a of the rhomb 21 angular ly inters ect mg an edge portion 16a of the square'eye" means; 12 at a point 31. Similarly theremaining part of the perimeter oftheeye means 30 is defined clockwise by edge portions 2gp, 24a, 24 23a, 23]),25 '1, and 25b of the rhombic eye means 21 respectively angularly joining edge portions 13 13b, 14 14 15a, 15ba'ndi16bof thefsquareeye means 12 at points 32, 33, 34, 35,36, '37, and 38respectively; It should be noted thatnone of the edge portions o ,the eye means 30 engage thetcircumfer'enceof the concentrieally disposedcircle -11, the circlev 11" being the same size asthose illustrated in FiguresiZ and 3. Therefore a rotary tool having the e ye rneansg iatl formwt therein is not adapted to be mounted on the particular reu ndshaped arbor for whichthe eyemeans 12;.and 21 areeooperable therewith, Inorder toprov dearotary teel would be adapted to, be, selectively mquntedton standard size square, rhombic, and round cross sectional arbors, a unique eye means must be formed therein. One such eye means is fully disclosed in the United States pateat to Gommel, No. 2,649,868, issued August 25, 1953.

The universal eye means disclosed in the aforementioned patent is illustrated in Figure 5. The rotary tool 1 0 is provided with a universal eye means 3? in the following manner. The eye means 39 is formed by superimposing the 'square eye means 12, illustrated in Figure 2, p a' hs hsm is e mean l s at in F g r 3- The square, eye means 12 is disposed concentrically with the rhombic eye means 21 in a manner similar. to the eye means 39, illustrated in Figure 4, except that the square eye means 12 is rotated about the rhombic eye means 21 until a pair of opposed: sides 14 and 16 thereof are superimposed upon and are rectilinear with the pair of opposed parallel sides 23 and 22 of the rhombic ye m ans. 21-, he er m ter the eye m ans, 2 thus formed deflated a. Pair f opppse pa a l ect inear de and 4: d a P i oppose e a y hap sides. 42 and 43, The, rectilinear side4 0 isdefined in part by the sidef22 of: the rhomb, and in part by the side 16 of the square. 12. Similarlythe rectilinear side 41 is defined in part by the side, 23. of the, rhomb 2L and the side 14 of the square 12. The irregular. side 42 is dee b a 129 Q h d 0f e sq a e 1 and a pgrtion oi the side 25 oi the rhomb 21, each portion angularly intersectingv one another at; a point 44. The other iirs u r i e 4 i s m ar y me a co p i a portion ofthe side 13 ofi the. square 12 and; a portion of he i e. Qf he r o ,1 e h. p i singularly joining, one another at a point 45, It can be seen that the eye means 39, is adapted; to be concentric with and cirqumsqribe he circle n mann whe y the op: PQ $9 95. 0 1 1 f h s s ns e pq n nt a Q- he. irc 1. t in s. 46 and 47 p cv ly- Ahhmi h h stssq n f i s h n 4 oi the irregulan sides 42 and, 43 respectively do not engage the circumference, of the circle 11', it was thought that it a round arbor. having a cross sectional diameter equal to thediameter of the circle 11;, the diameter being in the orderot of aninch, the. points 4,4and 45 would only allpvv; a play o f =0. Q10" between the rotary tool 10 and the ii idepfi ip sw f he und; rbor d p ithin the Ki is, phndi howeve hstrwhen, qt ry o d an e 9: orm d he i n, a. ma e v lu a ed in Eigure, 5, the play between the points and 45 of he sta mi 0: nd, ound b ved her s fi q snt, cau e m sali nme t t r, adver e 9 li iqhsh cah s e o a o l, a u is t ssis z me ssssnti r at v mt arhort was f r her inu dthatsit s hi h e pns i hheio e a i stand.- I 1. 91 hqmb r arb 21 he Power d en. m ch nes. there were many rotary tool maehines, having different 119i: 399: and qus sa shis. pre nv n hs qfqr s se ;stuniv sa e pme n or o a y. to Whhh lL QL iflr-hsadap e o recei t nd r i ed squarev and. standard sized; rhombic arbor but also a s si sls si z us bo he b he s posi ve en.- s ssmsqti tws n ps ims r ofithe s l mssnssandithe outer peripheral surfaceof. the round, arber, to, prevent P ay h tcs stws nt h s. we me ns. s, lustrated, in h s rsfisiidi i i sw he c bed- The eye meansfifirin the rotary tool 1!}; illustrated in Figure 6 is formed, in part, in substantially the same man; nerastheeyemeans 39-.shown inFigure 5 by superimposfihe qllf t t yfi means 1 19 1 ho yemeans 21, However, in addition a ,circle 49 is superimp p ht he fit te m 3 the i q 9; p z n: sntri -wi h h om 2, nd qua e 12 and hav n a diameter. greater than the diameter of the. previous de? 7 serihe d;circle1,1f. Intthistmannerthelcircle 49is adapted to have portions of its circumference tracelanarc 50, 51, 52 and, 53 respectiye1y .on each. side 42, 40, 43, and=41-of the eye means 39. The pattern traced by the arcs 5053 is then cut out from the tool thereby providing arcuate edge portions 54, 55, 56, and 57 respectively in the sides 42., 40, 43, and 41 of the eye means 39. It can be seen that when the rotary tool 10 illustrated in Figure 6 is mounted on a round arbor, the round arbor having a diameter equal to the diameter of the circle 49,.the arcuate edge portions 54--57 of the eye means 48 respectively engage the outer peripheral surface of that round arbor preventing any transaxial movement of the rotary tool 10 rela- I tive to the round arbor. The rotary tool 10 having an eye means 48 formed therein is adapted to receive selectively a standard size rhombic arbor, a standard size square arbor and a round arbor having a diameter substantially equal to the diameter of the circle 49 whereby portions of the perimeter of the eye means 48 are adapted to engage correspondingly shaped portions of the outer periphery of the selected arbor received therein.

It has been found that there are also many power driven machines having round and square shaped arbors where the arbors have a cross sectional size substantially smaller than the standard size round and square arbors particularly adapted for the eye means 48 Therefore, another feature of this invention is to provide means to be used in combination with the eye means 48 whereby the rotary tool 10 is adapted to be mounted on the smaller sized arbors.

As shown in Figure 7 the rotary tool 10 is formed with an eye means 48 in a manner similar to that previously described for Figure 6 and has a bushing means 58 disposed within the eye means 48 thereof. The bushing means 58 has a substantially circular outer peripheral surface 59 which is adapted to engage the arcuate edge portions 54-57 of the perimeter of the eye means 48. In this manner the bushing means 58 is'carried by the rotary tool 10 and is prevented from transaxial movement relative to the rotary tool 10. A central eye means 60 is in turn formed in the bushing means 58 which is adapted to receive a smaller size arbor than that for which the eye means 48 is adapted to receive. As shown in Figure 7 the bushing means 58 is formed with a substantially circular eye means 61 which is disposed concentric with the tool 10 when the bushing means 58 is carried thereby. Therefore, the rotary tool 10 illustrated in Figure 7 is adapted to be mounted on a smaller sized round arbor than the round arbor for which the eye means 48 is particularly adapted to receive.

As shown in Figure 8 the bushing means 58 is provided with a square eye means 62. By substituting the bushing means 58 illustrated in Figure 8 for the bushing means 58 shown in Figure 7 the rotary tool 10 will then be adapted to be mounted on a smaller sized square arbor than that for which the eye means 48 is adapted to receive.

It should be understood that the round bushing means 58 could be provided with any size eye means or combination of eye means thereof, the controlling feature thereof being the diameter defining the outer circumferential edge 59 whereby the bushing means 58 is adapted to be carried by the rotary tool 10 and have the edge 59 thereof engage each arcuate portion 54-57 of the eye means 48. It should also be understood that, if desired, the outer peripheral configuration of the bushing means 58 could conform to one other than circular so long as the bushing means 58 when disposed within the eye means 48 would be prevented from transaxial movement relative to the rotary tool 10.

While this invention has been disclosed in connection with certain specific embodiments thereof, it is to be understood that these are by Way of example rather than limitation, and it is intended that the invention be defined by the appended claims, which should be given a scope as broad as the prior art.

What is claimed is:

1. In combination, a rotary tool adapted for mounting selectively on arbors of a predetermined round, square or rhombic cross-sectional size, said tool having acentral eye means defined by a plurality of spaced arcuate portions having opposed ends, each of said arcuate portions means having a second central eye means formed therein adapted to receive an arbor means having a smaller crosssectional size than at least one of said arbors whereby said rotary tool is adapted to be mounted on said arbor means when said bushing means is disposed in said central eye means.

2. In combination, a rotary tool adapted for mounting selectively on arbors of a predetermined round, square or rhombic cross-sectional size, said tool having a central eye means defined by four spaced arcuate portions having opposed ends, each of said arcuate portions being superimposed upon a circumference of a circle concentric with said tool, and by four edge portions each respectively joining adjacent ends of adjacent arcuate portions, each of said edge portions alternately being superimposed upon adjacent sides of a rhomb concentric with said tool and upon adjacent sides of a square having opposite sides thereof superimposed on opposite parallel sides of said rhomb whereby any one of said arbors is adapted to be received in said central eye means to thereby mount said rotary tool on that particular arbor, and a bushing means disposed in said central eye means and engaging said arcuate portion thereof, said bushing means having a second central eye means formed therein adapted to receive an arbor means having a smaller cross-sectional size than at least one of said arbors whereby said rotary tool is adapted to .be mounted on said arbor means when said bushing means is disposed in said central eye means.

3. In combination, a rotary tool adapted for mounting selectively on arbors of a predetermined round, square or rhombic cross-sectional size, said tool having a central eye means defined by four spaced arcuate portions having opposed ends, each of said arcuate portions being superimposed upon a circumference of a circle concentric with said tool, and by four edge portions each respectively joining adjacent ends of adjacent arcuate portions, each of said edge portions alternately being superimposed upon adjacent sides of a rhomb concentric with said tool and upon adjacent sides of a square having opposite sides thereof superimposed on opposite parallel sides of said rhomb whereby any one of said arbors is adapted to be received in said central eye means to thereby mount said rotary tool on that particular arbor, and a bushing means disposed in said central eye means and engaging said arcuate portions thereof, said bushing means having a substantially circular eye formed therein adapted to receive a substantially round arbor means having a smaller cross-sectional size than said round arbor whereby said rotary tool is adapted to be mountedon said round arbor means when said bushing means is disposed in said central eye means.

4. In combination, a rotary tool adapted for mounting selectively on arbors of a predetermined round, square or rhorrrbic cross-sectional size, said tool having a central eye means defined by four spaced arcuate portions having opposed ends, each of said arcuate portions being superimposed upon a circumference of a circle concentric with said tool, and by four edge portions each respectively joining adjacent ends of adjacent arcuate portions, each of '2 aid d Po ns ltew tq y eing r mp ed u edi a j i of h mb ns n vric w th a d ml and f q' iac id? 9 a. SW 4? h vi ppQs i Skies thereof s'uperimpqsed 9 opposite parallel sides o fsaid rhpmb whereby any one qf said arboi s is adapted to be received in said central eye means to the elpy mgunt said om 9 on' he aitiq 'a 7 an Whine mean disposed n said a e we mea s n en a in S id lwe P s erwf s id vshies mea he ie a substaqtially equare eye fon r ed therei adapted t9 gegeive a substantially squarearbor meage having a smaller crossmtie a fi a Sa d ua mm a qby #2 wary a 8 tool is adapted to be qulited on said square arbor means when said bushing means is disposed in said central e Rgfel eqqes Qited in the file of this patent UNITED STATES PATENTS 147,364 Brown V Feb. 10, 1874 2 ,572, O4 2 Oct. 23, 1951 2 ,600,459 Adama June 17, 1952 2,649,868 Gommel "V Aug. 25, 1953 2,822,648 Met z ger et a1. Feb. 11, 1958 

